Okay, I have spent much time scanning this thread, so will add my own $.04. (That's my two cents' worth, adjusted for inflation.)
I started with the Jabra Move, which appear on many lists of 'best budget BT headphones,' and are often recommended as a top choice under $100. I got mine for $60 from the Jabra site right after last Thanksgiving. They sound good through BT, fit well, are light and comfortable, and give a very solid BT connection. My only quibble is that, whenever I turn them on, I have to go into my playing device and pair them up - they don't stay paired.
Not content to leave well enough alone, I then acquired the B&W P5 wireless model, which sells for $400. (I used frequent flyer miles to buy them.) To my dismay, the sound quality, after 100+ hours of burn-in, is only very slightly better than that of the $60 Jabra headphones -- the P5w gives slightly clearer and tighter bass and mid-bass and overall slightly better clarity, but the advantage is only apparent in direct comparisons - and even then it is subtle. The P5w is also heavier, harder to position properly on my ears (I hate the rectangular earpads - it's like having a couple bars of soap clamped to my noggin), and the BT signal cuts out more often. The real advantage of the P5w is that it stays paired with my device: all I have to do is put them on, press the power button, and press the pause/play button on the headphones and the music starts up just where it left off.
All of the above is through a latest-gen iPod, playing Spotify Extreme tracks (320 kbps).
If I were doing it again, I would've bought the Jabra Moves and been done with it.
Neither is a substitute for a good cabled headphone: at home, my Grado SR80e blows either of these BT 'phones out of the water. But for walking the dogs, cleaning the house, working in the yard, BT is the business.